Title: Thickness Dependent Phase Behavior of Antiferroelectric Liquid Crystal Films
Authors: Pan, LiDong
Wang, Shun
Hsu, C. S.
Huang, C. C.
應用化學系
Department of Applied Chemistry
Issue Date: 30-Oct-2009
Abstract: Free standing films of a liquid crystal compound with simple surface enhanced order were studied. The resultant phase diagram demonstrates that (1) the short helical pitch smectic-C-alpha* phase disappears below a film thickness of 10 layers, and (2) the temperature window of a distorted 4 layer smectic-C-FI2* phase increases dramatically upon decreasing film thickness. The experimental findings were attributed to the reduced dimensionality and enhanced surface effects in thin films. The results of the smectic-C-alpha* phase are consistent with what have been reported for helically ordered magnetic thin films, with a noticeable difference due to the opposite effect of the surface on ordering in the two systems.
URI: http://dx.doi.org/10.1103/PhysRevLett.103.187802
http://hdl.handle.net/11536/6548
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.103.187802
Journal: PHYSICAL REVIEW LETTERS
Volume: 103
Issue: 18
Begin Page: 0
End Page: 0
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